It does not matter as long as it is a top tier gas station.
Some gas stations like Shell and Sunoco claim to put more gas detergents that clean the interior bits of our engines, but as long as you get top tier you are fine.
If I am being completely honest. My "butt dyno" feels like my M3 runs better if i go to Shell or Sunoco than other top tier gas stations, but I will attest its probably all in my head.
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